]> 2026-04-17T01:10:28+00:00 Case study:Biologisk återställning i Rolfsåns vattensystem 500 en Approved 10 - 50 m Dam removal Creation of fish passes Fish: Disturbance-sensitive species,,,,,, Fish: Abundance,,,,,, Fish: Species composition,,,,,, Invertebrates: Disturbance-sensitive species,,,,,, Fish: Disturbance-sensitive species Fish: Abundance Fish: Species composition Invertebrates: Disturbance-sensitive species Dam removal Creation of fish passes County Administrative Board of Västra Götaland Fenno-Scandian Shield County Administrative Board of Västra Götaland Federal Nature Protection Agency Energy company producing water electricity (Göteborg Energi) Yes Yes Yes false Continuity for organisms,,,,,, Continuity for organisms No Anna Ek County Administrative Board of Västra Götaland County Administrative Board of Västra Götaland 57.489124564034,12.120140712109 Arolam Andreas County Administrative Board of Västra Götaland Bäckstrand 1 - 10 m³/s Dam removal, Creation of fish passes,,,Dam removal, Creation of fish passes ,,, Anna Ek ,,,,,, 757 ,,,,,, http://projektwebbar.lansstyrelsen.se/rolfsan/Sv/folj-atgardsarbetet/rolfsan/Pages/rolfsan.aspx Myrekulla380A.jpg 2006-01-01Z 2453736.5 Complete The River Rolfsån in South West Sweden had large populations of salmon, trout and european eel in the 1800s. After expansion of hydropower, cleansing of rivers and intensive fishing in the last hundred years there has been sharp decrease on the amount of migrating fish stocks. The river has been classified as extremely valuable by its natural characteristics. National Board of Fisheries classed the population particularly worth of protection. The Atlantic Salmon in Rolfså is unique, Fish are large and there has not been mixing between farmed salmon. The River was restored for sea migrating brown trout and eel, Atlantic salmon and river pearl mussel in co-operation with two administrative boards, four municipalities, the Swedish Agency for Marine and Water Management and land owners and fishing associations. The project started in 2006 and there has been two nature like bypass channels, one pool fishway and one downstream fishway built. Also one hydroelectric powerplant dam and two weirs has been removed and some streams has been restored as habitat for migrating fish. All and allreproductive area for salmon and sea migrating broun trout has expanded from 35 000 square meters to 250 000 square meters. The project was managed and mostly financed by the Länsstyrelse/Västra Götaland (regional environmental authority). The rest of the financing has been organized by the national environmental institute, Naturvårdsvärket, who is responsible for targeting the money collected from the hydro power companies to the watercourses which have been deteriorated by hydro power production. Biologisk återställning i Rolfsåns vattensystem biologisk återställning i rolfsåns vattensystem http://projektwebbar.lansstyrelsen.se/rolfsan/Sv/Pages/default.aspx No Rolfsån River Basin Skagerrak and Kattegat River basin River Rolfsån river rolfsån EU - Special Area of Conservation Rolfsån River rolfsån river Sea trout (Salmo trutta) European eel (Anguilla anguilla) minnow Brown trout (Salmo trutta) Atlantic salmon (Salmo salar) Anna Ek County Administrative Board of Västra Götaland Rolfsån River Fisheries Habitat and biodiversity Hydropower SE640778- 130948 Rolfsån River 2012-01-01Z 2455927.5 2012-07-31T17:33:15Z 2456140.2314236 2017-06-02T08:58:54Z 2457906.8742361 Biologisk återställning i Rolfsåns vattensystem 500 1 plainlist 5 [[Category:Case study]] [[Project title::!Biologisk återställning i Rolfsåns vattensystem]] [[Subcatchment title::Rolfsån River]] Biologisk återställning i Rolfsåns vattensystem# QUERYe0a9cde596ab9cbcf617e60e6707be83 500 1 list 3 [[Category:Case study]] [[Parent project::Case study:Biologisk återställning i Rolfsåns vattensystem]] Biologisk återställning i Rolfsåns vattensystem# QUERY7c85633749b71def1af2648bb630821c Case study:Ålgårda nature-like bypass channel at River Rolfsån 500 en Ålgårda nature-like bypass channel at River Rolfsån Case study:Bosgården nature-like fishway at River Rolfså 500 en Bosgården nature-like fishway at River Rolfså Case study:Apelnäs fishway at River Rolfså 500 en Apelnäs fishway at River Rolfså Case study:Dam removal at Grönkullen, River Rolfsån 500 en Dam removal at Grönkullen, River Rolfsån Case study:Restorations of River Nolån-Hulta dam removal 500 en Restorations of River Nolån-Hulta dam removal Case study:´Restorations of River Nolån-Bypass channel in Hulta Hydro power plant 500 en ´Restorations of River Nolån-Bypass channel in Hulta Hydro power plant Case study:´Restorations of River Nolån-Fishway in Forsa hydro power plant 500 en ´Restorations of River Nolån-Fishway in Forsa hydro power plant Parent project 102 en Parent project